Foundation wire for card cylinders



p 16, 1958 J. D. HOLLINGSWORTH 2,851,736

FOUNDATION WIRE FOR CARD CYLINDERS Filed Sept. 26, 1955 INVENTORI JOHN D. HOLLINGSWORTH BY W W United States P FOUNDATION WIRE FUR CARD CYLINDERS John D. Hollingsworth, Greenville, S. C.

Application September 26, 1955, Serial No. 536,699

4 Claims. (Cl. 19112) -The.pr"esent invention relates to card cylinders and more particularly to card cylinders equipped with metallic card clothing.

Card cylinders for cotton cards, generally having a standard diameter of fifty (50") inches, were designed originally for flexible (or fillet) card clothing. Since metallic card clothing is approximately half the height of flexible (or fillet) card clothing, the former cannot be substituted for the latter without substantial loss in effective cylinder diameter if the clothing is Wound directly upon the card cylinder. This loss in eifective diameter is suflicient to prevent proper adjustment of other parts of the card. Fillet card clothing is normally high and increases the 'elfective or overall diameter of a, 50 diameter clothed cylinder by of an inch the overall diameter over the points of the clothing being 50%". With metallic card clothing, which is m" high, it is obvious that the diameter of the unclothed cylinder must be increased by to bring the overall diameter up to the standard 50%" diameter required for proper cooperation with associated parts of the card.

It is an object of the present invention to provide novel and improved means for maintaining the overall diameter of a card cylinder substantially constant when metallic clothing is used instead of or substituted for flexible or fillet clothing.

Another object is to provide an improved foundation for metallic card clothing on the card cylinder, said foundation having a radial thickness calculated to maintain a standard overall cylinder diameter when the latter is clothed with the metallic clothing.

Another object is to provide a foundation of the character set forth which will not materially increase the weight of the clothed cylinder.

A further object is to provide a foundation formed of aluminum or like light weight wire and of novel configuration, said foundation wire being adapted for application in helical convolutions to the card cylinder to form a foundation of the described characteristics for subsequently applied metallic card clothing.

Other objects will appear hereinafter.

In the accompanying drawings:

Fig. l is a view in perspective of afragmentary length of the toothed wire which forms the metallic card clothing;

Fig. 2 is a view in perspective, on an enlarged scale, of a fragmentary length of a build-up or foundation wire made in accordance with the invention;

Fig. 3 is a top plan view of the wire of Fig. 2;

Fig. 4 is a fragmentary view showing a section of a card cylinder to which the foundation wire of this invention has been applied in helical windings;

Fig. 5 is a sectional view on the line 55, Fig. 4 showing also a section of the subsequently applied metallic card clothing;

Fig. 6 is a fragmentary view in perspective illustrating wire.

on reduced scale a modification within the scope of the invention, and

Fig. 7 is a fragmentary sectional View also on a reduced scale illustrating the manner in which a foundation wire of this form is applied to the card cylinder.

Referring to the drawings, metallic card clothing of the type to which the invention pertains is provided in the form of wire 10, as shown in Fig. 1, said wire comprising a base 11, having projecting teeth 12, tapering from the base to a sharp point and arranged in longitudinal series throughout the length of the wire. This wire is applied inhelical windings to the card cylinder to form the clothing. As previously setforth, the height of this type of clothing is less than that of the fillet type for which the conventional 50" diameter card cylinder was designed, and accordingly it becomes necessary if metallic card clothing is to be applied to such cylinder to build up the diameter of the latter to an extent compensati'ng for the deficiency in height of the clothing.

For this purpose, and in accordance with the invention, I provide a foundation wire 13 of the channel section shown in Fig. 2, the transverse web 14 of which is interrupted by transverse slots 15. Preferably the slots also intersect the legs 16 and 17 of the channel in the areas adjoining the web 14; and-in the present instance the slots extend diagonally to the sides of the Alsoin accordance with the invention, the wire is composed of aluminum, magnesium, titanium .or other light weight metal or similarly light non-metallic material, although aluminum is preferred for reasons of economy.

As a specific example of a foundation wire made in accordance with the invention, it may be formed in the cross-sectional channel form described above from thick aluminum sheet. The maximum width of the wire may be /2" and its maximum depth in this dimension the tolerance should be within .001" either way. The legs 16 and 17 of the channel may have a slight inward cant not to exceed say 5, but the outer surfaces of the legs should form an angle with the upper surface of the web 14 of not less than so that when the wire is wound on the cylinder, as hereinafter described, the side edges of the web portion of the adjoining convolutions of the wire may abut each other. The top corners of the inverted channel, however, may have a slight radius not to exceed say .005. I have found that a suitable width for the slots 15 is with a depth of measured from the upper surfaceof the web. At the lower corners, where they intersect the legs 16 and 17 of the channel, a radius of say .025" is desirable. Preferably, the spacing of the slots is such as to afford a width in the relatively spaced sections of the web 14 of the transverse dimensions of both the web sections and the slots being measured on a line paralleling the longitudinal side edges of the channel. The relative dimensions outlined above will afford a height of at the slotted portions of the legs 16 and 17, i. e. the dimension between the bottoms of the slots 15 where they intersect the legs and the lower edges of the legs. As indicated, the slots extend diagonally to the longitudinal side edges of the wire, and a 70 angle as measured between the side edge of the wire and the edge of the slot has been found suitable. A foundation wire of this form composed of aluminum will weigh approximately one-tenth of a pound per foot of length.

As illustrated in Fig. 4, the foundation Wire is applied in helical abutting convolutions to the surface of the standard 50 diameter or other card cylinder so as to increase the effective diameter of the cylinder to 50%. The foundation wire forms an extremely light weight but strong and firm foundation for the metallic card clothing shown in Fig. 1, this clothing being wound in the conventional abutting helical convolutions on the interrupted webs 14 of the foundation, as illustrated in Fig. 14, to provide the desired clothing for the cylinder. As previously set forth, the overall height of metallic card clothing of this character is so that its application to thefoundation as described afiords a clothed cylinder of 50%", this being the diameter of the standard carding cylinder.

The embodiment of the invention illustrated in Figs. 6 and 7 may consist of an aluminum wire 18 of rectangular section having, by way of example, a width of and a total height of 7 and provided in its upper edge with a series of recesses 19 which may suitably be 7 in width, i. e. the dimension longitudinally of the wire, and preferably being uniformly spaced, as illustrated. The distance between the proximate sides of adjoining recesses may be 7 Preferably, the bottom corners 20 of the recesses will have a small radius of say .025". With the foregoing dimensions the bottoms 21 of the recesses Will be approximately .084" from the bottom edge of the wire. In assembly, this wire will be wound in abutting helical convolutions on the card cylinder or roll 22 in the manner illustrated in Fig. 7 so that the recesses 19 will appear on the peripheral surface. of the built-up roll. It will be noted that these recesses will not have continuity axially of the roll since in the adjoining convolutions the recesses will not normally be in accurate registration.

It will be apparent that the invention provides a. means for substitution of metallic card clothing for fillet clothing on a standard 50" diameter card cylinder without change in the effective overall diameter of the clothed cylinder; and that this substitution is obtained by economical and highly practical means and with minimum increase in the overall weight of the cylinder, this latter factor being of importance in those installations where additional Weight added to the cylinder adversely affects other parts of the card particularly the bearings which support the cylinder.

I claim:

1. In a carding device, a cylinder, metallic card clothing carried by said cylinder, and a foundation wire interposed between the surface of the cylinder and the clothing and forming a seat for the latter, said wire having approximately parallel side faces and being wound in side abutting helical convolutions on said cylinder surface, the top surface of the wire being interrupted by a longitudinal series of relatively spaced transverse recesses with the areas between said recesses forming collectively the said seat for the clothing.

2. A carding device according the claim 1 wherein the foundation wire is channel shaped in cross section with the legs of said channel seated on the cylinder surface.

3. A carding device according to claim 2 wherein the transverse recesses extend entirely through the transverse Web of the channel and into the adjoining areas of he legs. m

4. A carding device according to claim 1 wherein the foundation wire is composed of light weight metal such as aluminum.

References Cited in the file of this patent UNITED STATES PATENTS 1,337,470 Platt Apr. 20, 1920 1,471,782 Eckart Oct. 23, 1923 2,252,305 Puschner Aug. 12, 1941 2,591,160 Kilian Apr. 1, 1952 

